Understanding the Strengthening Effect of β1 Precipitates in Mg-Nd Using In Situ Synchrotron X-ray Diffraction

被引：29
作者：
Zhou, Bijin [1 ]
Wang, Leyun [1 ]
Zhu, Gaoming [1 ]
Wang, Jie [1 ]
Wen, Wen [2 ]
Zeng, Xiaoqin [1 ,3 ]
机构：
[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China
[3] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China
来源：
JOM | 2018年 / 70卷 / 10期
基金：
中国国家自然科学基金;
关键词：
MECHANICAL-PROPERTIES; DEFORMATION-BEHAVIOR; NEUTRON-DIFFRACTION; RE ALLOYS; ZR ALLOY; MAGNESIUM; PHASE; MORPHOLOGY; EVOLUTION; FABRICATION;
D O I：
10.1007/s11837-018-2972-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In situ synchrotron x-ray diffraction was carried out at beamline BL14B1 of Shanghai Synchrotron Radiation Facility (SSRF) to study the tensile deformation of an extruded Mg-2.2 wt.%Nd alloy before and after aging. The aged specimen that contained beta(1) (Mg3Nd) precipitates showed higher strength than the nonaged specimen, while the strain to failure of the two specimens was almost equal. Analysis of the lattice strain evolution in the aged specimen revealed a modest load-transfer effect from Mg to beta(1) after 2% strain. Peak width analysis indicated that a high level of microstrain developed in beta(1) immediately after material yielding. Ex situ transmission electron microscopy (TEM) showed strong interaction between basal dislocations and beta(1) precipitates. Based on these results, it is proposed that the extra strength in the aged specimen is caused by beta(1) impeding dislocation movement and eventually being sheared by dislocations.
引用
收藏
页码：2315 / 2320
页数：6
相关论文
共 30 条
  • [1] In situ neutron diffraction and polycrystal plasticity modeling of a Mg-Y-Nd-Zr alloy: Effects of precipitation on individual deformation mechanisms
    Agnew, S. R.
    Mulay, R. P.
    Polesak, F. J., III
    Calhoun, C. A.
    Bhattacharyya, J. J.
    Clausen, B.
    [J]. ACTA MATERIALIA, 2013, 61 (10) : 3769 - 3780
  • [2] Slip mode dependency of dislocation shearing and looping of precipitates in Mg alloy WE43
    Bhattacharyya, J. J.
    Wang, F.
    Stanford, N.
    Agnew, S. R.
    [J]. ACTA MATERIALIA, 2018, 146 : 55 - 62
  • [3] Interfacial structures and energetics of the strengthening precipitate phase in creep-resistant Mg-Nd-based alloys
    Choudhuri, D.
    Banerjee, R.
    Srinivasan, S. G.
    [J]. SCIENTIFIC REPORTS, 2017, 7
  • [4] Misfit-driven β′′′ precipitate composition and morphology in Mg-Nd alloys
    DeWitt, Stephen
    Solomon, Ellen L. S.
    Natarajan, Anirudh Raju
    Araullo-Peters, Vicente
    Rudraraju, Shiva
    Aagesen, Larry K.
    Puchala, Brian
    Marquis, Emmanuelle A.
    van der Ven, Anton
    Thornton, Katsuyo
    Allison, John E.
    [J]. ACTA MATERIALIA, 2017, 136 : 378 - 389
  • [5] Plasticity analysis by synchrotron radiation in a Mg97Y2Zn1 alloy with bimodal grain structure and containing LPSO phase
    Garces, G.
    Morris, D. G.
    Munoz-Morris, M. A.
    Perez, P.
    Tolnai, D.
    Mendis, C.
    Stark, A.
    Lim, H. K.
    Kim, S.
    Shell, N.
    Adeva, P.
    [J]. ACTA MATERIALIA, 2015, 94 : 78 - 86
  • [6] Influence of SiC particles on compressive deformation of magnesium matrix composites
    Garces, G.
    Onorbe, E.
    Perez, P.
    Klaus, M.
    Genzel, C.
    Adeva, P.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2012, 533 : 119 - 123
  • [7] Study of the mechanical properties of Mg-7.7at.% Al by in-situ neutron diffraction
    Gharghouri, MA
    Weatherly, GC
    Embury, JD
    Root, J
    [J]. PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1999, 79 (07): : 1671 - 1695
  • [8] Fabrication of extraordinary high-strength magnesium alloy by hot extrusion
    Homma, T.
    Kunito, N.
    Kamado, S.
    [J]. SCRIPTA MATERIALIA, 2009, 61 (06) : 644 - 647
  • [9] Effect of Zn additions on the age-hardening of Mg-2.0Gd-1.2Y-0.2Zr alloys
    Honma, T.
    Ohkubo, T.
    Kamado, S.
    Hono, K.
    [J]. ACTA MATERIALIA, 2007, 55 (12) : 4137 - 4150
  • [10] Towards the development of heat-treatable high-strength wrought Mg alloys
    Hono, K.
    Mendis, C. L.
    Sasaki, T. T.
    Oh-ishi, K.
    [J]. SCRIPTA MATERIALIA, 2010, 63 (07) : 710 - 715
123